Silicon periodic nanostructures for high efficiency absorption in thin film solar cells

Xiaowei Guo; Hengchang Lu; Guolin Luo; Cheng Yang; Shaorong Li

doi:10.1117/12.2301294

16 February 2018 Silicon periodic nanostructures for high efficiency absorption in thin film solar cells

Xiaowei Guo, Hengchang Lu, Guolin Luo, Cheng Yang, Shaorong Li

Proceedings Volume 10527, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VII; 1052716 (2018) https://doi.org/10.1117/12.2301294
Event: SPIE OPTO, 2018, San Francisco, California, United States

Abstract

Enhancing the light absorption in ultrathin-film silicon solar cells is important for improving efficiency and reducing cost. In this paper, we report a highly effecient cosine periodic nanostructure as light trapping texture. The design and fabrication as well as measurement of cosine nanotextures were presented. The optimized structure yields an average reflectance of 7.07% at an equivalent silicon thickness of 10μm, much better than planar and random pyramid structures. The measurements demonstrate that the absorptions in ultrathin film solar cells are very close to the Yablonovitch limit for the entire solar spectrum and insensitive to the angle of the light. This approach is applicable to various thicknesses and promising in future glass-based thin film solar cells.

Citation Download Citation

Xiaowei Guo, Hengchang Lu, Guolin Luo, Cheng Yang, and Shaorong Li "Silicon periodic nanostructures for high efficiency absorption in thin film solar cells", Proc. SPIE 10527, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VII, 1052716 (16 February 2018); https://doi.org/10.1117/12.2301294

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